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i) the oom-killer process invoked and it kills the process one-by-one it includes oracle, ssh, bash login etc. its because of low memory value

ii) the LOW MEM value gets reduces rapidly when i run Oracle

iii)swap memory is not at all utilised even low memeory is fully drained

work arround we done:i) set the following parametersvm.overcommit_memory=2vm.overcommit_ratio=70To debug the issue as recommended by some forums but it is not at all solved.ii)some other suggestion is to set the "vm.lower_zone_protection=100" But there is no kernel parameter as such in RHEL 5.2. Is there any other alternative param in RHEL5.2 to this param.

If anyone have the idea to solve this issue, pls help us.Thanks in advance